This brochure is designed to provide an overall guide to
the Hambleside Danelaw Roofing and Ventilation range
of products. Further technical information is available by
contacting our Daventry Sales Office on 01327 701910.

The illustrations below
reflect the basic ventilation
requirements which would
normally be applicable.
For additional information
please refer to the current
Building Regulations
and appropriate British
Standards.
Dimensions in millimetres.

Hambleside Danelaw and the Environment
Brief details on our environmental policy are shown on the back cover of this brochure. Copies
of our Environment brochure and our Corporate Social Responsibility statement are available
on our web site or through our Daventry office.

Where appropriate products
have been independently tested for
suitability, purpose and performance
by Birmingham City Laboratories.

(E)

(F)

Hambleside Danelaw is a member of
the RIBA NBS Plus electronic library
service.
Hambleside Danelaw is an associate
member of the Builders Merchant
Federation.
Hambleside Danelaw are associate
manufacturing members of the
National Federation of Roofing
Contractors and also participate in the
co-partnership guarantee scheme.

+15°
(Less than 15°, 25mm required at eaves)

(G)

Regulations & Requirements on Ventilation

Roof Ventilation
Ventilation to negate the effects of condensation in roofs is essential to
comply with Building Regulations, Building Standards and British Standards.
Ventilation openings should be provided on the longer sides of rectangular
roofs and designed to prevent the ingress of rain, snow, birds and large
insects. Minimum mesh/grille sizes should not be smaller than 4mm to avoid
excessive airflow resistance. Particular attention should be paid to potential
restrictions at changes in roof slope or changes in constructional details
and at junctions with walls. The Hambleside Danelaw range of ventilation
products is manufactured to enable compliance with all current technical
requirements and standards.
BUILDING REGULATIONS – THE REQUIREMENTS
Approved Document C2 (2004 Edition including 2010 amendments) requires
that roofs be designed and constructed so that their structural and thermal
performance are not adversely affected by interstitial condensation.
This requirement will be met if the roof is designed and constructed in
accordance with Annex H of BS 5250:2011 ‘Code of practice for control
of condensation in buildings’ and BS ENISO13788:2012 ‘Hygrothermal
performance of building components and building elements. Internal
surface temperature to avoid critical surface humidity and interstitial
condensation. Calculation methods.’ Further guidance is given in BRE Report
BR262 ‘Thermal insulation: avoiding risks’, 2002 edition.
To avoid excessive moisture transfer into roof voids, gaps and penetrations
for pipes and electrical wiring should be filled and sealed, particularly in
areas of high humidity such as kitchens and bathrooms and an effective
draught seal should be provided to loft hatches to reduce the inflow of
warm air and moisture. Vapour control layers can reduce the amount of
vapour entering roof voids but cannot be relied on as an alternative to
ventilation. A complete barrier to moisture is needed for this.
Scottish Technical Handbooks section 3.15 requires that dwellings shall
be so constructed as to protect the building and its users, so far as may
be reasonably practicable, from harmful effects caused by surface and
interstitial condensation. Both these requirements are deemed to be
satisfied by following the guidance given in BS 5250.
BS 5534:2003 + AI : 2010 ‘Code of practice for slating and tiling (including
shingles)’ recommends that roof ventilation be provided in accordance with
BS 5250.
COLD ROOFS WITH A PITCH OF 15° OR MORE
Pitched roof spaces should have ventilation openings at eaves level
(Fig. A) on opposite sides of the structure at least equal to an opening
of 10mm wide and running the full length of the eaves to promote cross
ventilation. For roof pitches above 35° or spans in excess of 10m, additional
high level ventilation at or close to the ridge equivalent to a continuous
opening of 5mm should be provided.
A pitched roof that has a single slope or abuts a wall (Fig. F) should have
ventilation at high level equal to a continuous opening of 5mm wide in
conjunction with an opening of at least 10mm wide at the eaves.
High level ventilation should never be used on its own as the wind suction
effect created will increase water vapour transfer into the roof void.
Pitched roofs where part or all the insulation follows the pitch of the roof
(Fig. C) should have ventilation openings on opposite sides of the structure
at least equal to a continuous opening of 25mm wide. In addition, such
structures require ventilation at or close to the ridge equivalent to a
continuous opening of at least 5mm. The void between the underside of
the roof covering and the insulation should have a free air space of at least
50mm. In this application, a vapour control layer should also be provided on
the warm side of the insulation.
COLD ROOFS WITH A PITCH OF LESS THAN 15°
Roof spaces in low pitched and flat roofs should have ventilation openings
at eaves level (Figs. B, D & E) on opposite sides of the structure at least
equal to an opening of 25mm wide to promote cross ventilation. Roof voids
should have a free air space of at least 50mm between the roof deck or
underside of the roof covering and the insulation.
Mono pitched roofs should be provided with ventilation of at least the
equivalent of a 25mm continuous opening at eaves and 5mm at the ridge.
WARM ROOFS
Condensation should be controlled by ventilation beneath the underlay
and above the insulation by the provision of a 25mm wide continuous
ventilation opening or equivalent at eaves or low level and a 5mm
continuous ventilation opening or equivalent at the ridge or high level. The
space between the underlay and the insulation should be at least 50mm
deep with a minimum of 25mm at the centre of the underlay drape. A well
sealed ceiling and separate vapour control layer should be used on the
warm side of the insulation.

Vapour Permeable Underlays
BS 5250:2011 provides recommendations and alternative approaches when
using vapour permeable or ‘Low Resistance’ (type LR) underlays that when
followed, can achieve compliance with Building Regulations. Caution should
be taken when proposing to use VPU’s and reduce ventilation levels on
re-roof & refurbishment projects.
Horizontal Insulation:
With slated or tiled roofs containing horizontal insulation over a horizontal
ceiling, the use of an LR underlay with unsealed laps can allow for a
reduction in the area of roof ventilation openings providing that the roof
covering can be determined as sufficiently air open in accordance with
Annnex L of BS 5534:2003 but with equipment designed to measure low
pressure differences down to 2 Pascals. On buildings ‘typical’ of housing,
with insulation at ceiling level and with the LR underlay laid above or below
counterbattens or onto open jointed sarking boards, the requirement is for
low level continuous equivalent ventilation openings that may be reduced
from 10mm to 7mm for a ‘normal’ ceiling and 3mm for a well sealed
ceiling as defined in BS 9250:2007. For larger roofs of this type, such as
supermarkets, schools, hospitals etc., the minimum equivalent opening
remains at 10mm for a normal ceiling but may be reduced to 5mm for a
well sealed ceiling with an additional continuous 5mm opening at high
level.
Where continuous boarding or close jointed sarking boards are used under
the slates or tiles, an LR underlay should be treated as a ‘High Resistance’
(type HR) and ventilation should always be provided to the roof space below
the underlay. When an existing roof is being recovered, it may be impossible
to achieve a ceiling that is as well sealed as in new build therefore caution
must be taken and consideration given to providing the equivalent to at
least a continuous 7mm opening or the addition of the equivalent to a
continuous 5mm opening at high level.
Most proprietary low level ventilation products that provide an area
equivalent to a 10mm continuous opening will easily satisfy all of the
reduced ventilation requirements. BS 5250:2011 does not cover situations
where it is proposed to provide no ventilation in cold roof applications. In
such cases, all of the conditions and requirements of independent technical
approval certification (e.g. BBA) should be met.
Inclined Insulation:
Slated or tiled roofs that are air open containing inclined insulation above
inclined ceilings may be constructed without ventilation if an LR underlay is
used that can either be laid fully supported on the insulation or draped and
unsupported. It is essential to provide a well sealed ceiling in accordance
with BS 9250:2007 and a separate vapour control layer.
If there is any doubt about the ability to provide and maintain an effectively
sealed vapour control layer then ventilation should be provided as if the
underlay was impermeable or an HR type in accordance with the section
headed ‘Warm Roofs’.
With this type of construction, an effective vapour control layer of
high vapour resistance, sealed at the laps and at all roof details, e.g. hips,
valleys, ridges, abutments, firewalls and around all penetrations created
by services, etc., should be provided. The designer should be sure that the
vapour control layers and/or insulation can be installed and maintained air
tight for the design life of the building.
FIRE PERFORMANCE OF ROOF VENTILATION PRODUCTS
In general, and for the purposes of Building Regulations requirement
B4, small plastic components such as slate and tile ventilators and soil pipe
penetrations that occur on the surface of the roof and jointing and
ventilation strips that appear at ridges, hips and soffits are regarded as
insignificant and are therefore not covered in Approved Document B and
can normally be ignored.

UNDERFLOOR Ventilation
Suspended Floors at Ground Level
Any suspended floor next to the ground will meet the requirements of
Building Regulations Approved Document C, Scottish Technical Handbook
3.4 and BS 5250:2011 Annex F provided that:
a) the ground is covered so as to resist moisture and prevent plant growth
and;
b) there is a ventilated air space between the ground covering and the
floor construction of at least 150mm and;
c) there are damp-proof courses between the floor construction and any
material that can carry moisture from the ground.
Two opposing external walls should have ventilation openings placed so
that the ventilating air will have a free path between opposite sides and to
all parts. The openings should be large enough to give an actual opening
of at least equivalent to 1500mm² for each metre run of wall or 500mm²
per m² of floor area whichever gives the greater opening area, this opening
area also being provided in internal sleeper walls or similar obstructions
to maintain the underfloor ventilation. Any pipes needed to carry this
ventilating air should have a diameter of at least 100mm.

1

Product Applications

Ventilation

PRODUCT SELECTION

EAVES AND SOFFIT VENTILATORS

As a general guide to assist in choosing the correct products
from the Hambleside Danelaw range, first identify the type
of roof detail from the typical examples A to G illustrated,
then select the combination of products from the range to
achieve full cross flow ventilation in accordance with the
Building Regulations.
A

HD FPC
Flexi-pipe can
be used as an
extension to all
HDL Soil Pipe
Adapter Kits

3

Roof Ventilation Products

Soffit Ventilators
51

SOFFIT VENTILATORS
HD 8000 & HD 8250

22

HD 8000

80

HD 8250

22

USE: Permits entry of air into
roofspace in projecting soffit
situations. When fitted on
opposite sides of a rectangular
roof structure will satisfy the
requirements of the Building
Regulations, e.g. front and rear
elevations.
ADVANTAGES: Lightweight,
easy to handle and fix strips.
(Strips are punched with
fixing slots.) Will support
soffit boards between 4mm
and 10mm in thickness, up
to 300mm wide without
additional noggins; provides

USE: Permits entry of air into
roofspace in projecting soffit
situations. When fitted on
opposite sides of a rectangular
roof structure will satisfy the
requirements of the Building
Regulations, e.g. front and rear
elevations.
ADVANTAGES: This ventilator
is designed for use with
sloping soffit situations, and
may be butted up to brickwork
when used without a soffit
board. Other applications
for this ventilator exist,
for instance, in no fascia

USE: To provide air ventilation
at eaves level where a
continuous masonry corbel
of brick, stone or similar is
constructed.
BENEFITS: The base at the
rear of the ventilator has a
dovetail anchoring slot which
enables security ties to be
positively attached at any
position to suit the corbel
masonry joints.

USE: To provide a throughflow of ventilating air over the
fascia board in both new build
and refurbishment details.
ADVANTAGES: Unique two
stepped fixing positions
to allow for use on roofs
above and below 15° of
pitch, allowing the throughflows of air at 25,000mm²
and 10,000mm² per metre
respectively. Reinforced nailing
guides ensure accurate fixing
to fascia and also for eaves
comb filler. Standard flyscreen
conforms to regulation

USE: To provide a throughflow of ventilating air over the
fascia board in both new build
and refurbishment details.
ADVANTAGES: Reinforced
nailing guides ensure
accurate fixing to fascia and
also for eaves comb filler.
Standard flyscreen conforms
to regulation requirements.
Rounded front section prevents
blocking of airflow from
overlapping underlay. Use
with Hambleside Danelaw’s

USE: In normal situations
the insulation is laid up to
and over the wall plate to
avoid ‘cold bridging’. In
some cases this insulation
can block the air circulation
into the roofspace. The panel
ventilator is fitted between the
insulation and underlay and
over the rafters to ensure a
clear air passageway from the
soffit into the roof space; use
when the roof pitch is either
below 15° or above 15°.

SINGLE FLYSCREEN +15° PITCH
HD 6050, HD 4550, HD 4050
USE: For open eaves details,
protruding flyscreen with
recommended 4mm slots; use
on roof pitches of 15° or above.
FLYSCREEN PANELS: The
6050 range of Panel Ventilators
is available with a single row
of slotted screen protection.
These panels, when fitted to
every rafter centre will provide
the regulation requirement of
a continuous 10mm gap at the
eaves.

USE: For open eaves details,
protruding flyscreen with
recommended 4mm slots; use
on roof pitches below 15°.
FLYSCREEN PANELS: The
6025 range of Panel Ventilators
is available with double rows
of slotted screen protection.
These panels, when fitted to
every rafter centre will provide
the regulation requirement of
a continuous 25mm gap at the
eaves.

3 IN 1 VENTILATOR PACK
HD 3025VP
The most cost effective and
simple way of providing a
complete ventilation and felt
or underlay support system
giving additional protection
to the fascia detail of all roof
types.
A unique feature of this
system is the new Universal
Over Fascia Ventilator with
two fixing positions that adapt
to 10mm and 25mm airflows.
HD 3025VP contains:
1 x 6 metre Roll Panel
(HD 5000)
10 x 600mm Underlay Support
Trays (HD 3000)
6 x 1 metre Over Fascia Vent
(HD 12000U).
The products within the
‘3 in 1’ pack are available
separately.
THE HD 3000VP VENT PACK
IS ALSO AVAILABLE WITH A
STANDARD FIX 10,000mm²
AIRFLOW OVER FASCIA
VENTILATOR.

Installation of the HD 3025VP
Vent Pack is straightforward.
The Over Fascia Ventilator
is fitted to the top edge of
the fascia board, in either of
the two stepped positions,
to suit the required level of
airflow and the Roll Panel and
Underlay Support Tray are
then installed.
The Underlay Support Tray
is placed on top of the Over
Fascia Ventilator and nailed
into place through holes
provided in the over fascia
vent. This will make it much
easier to locate alternative
nail holes if an Eaves Comb
Filler is to be fitted. It is then
nailed at the top edge of the
tray through the Roll Panel if
required and into the rafter.
Consecutive trays are lapped
by 50mm using the raised
locators formed into the tray
sides. The Underlay Support
Tray forms the drip into the
gutter.
AIRFLOWS:
25mm fixing position =
25,000mm² per metre
10mm fixing position =
10,000mm² per metre

ROLL PANEL VENTILATOR
HD 5000
USE: Prevents insulation
blockage at eaves and allows
high levels of cross flow
ventilation – eaves to eaves.
Use in conjunction with the
Hambleside Danelaw range of
soffit ventilators to achieve full
eaves to eaves airflow.

UNIVERSAL REFURBISHMENT TRAY VENTILATOR
HD URT
USE: A rafter tray specifically
designed for installation into
the eaves of a completed
and traditionally constructed
tiled or slated roof. Inserted
to ensure that insulation
blockage of the path of air
necessary to ventilate the roof
space does not occur.
If no means of introducing
air through the soffit or over
fascia exists the HD 7000
Circular Soffit can be fitted
retrospectively into the soffit
board.

BENEFITS: A universal
refurbishment tray designed
to be used either as a single
panel to rafter centres of
450mm or below 450mm by
trimming the panel to suit. For
rafter centres between 450mm
and 600mm the panel can be
extended by cutting a second
panel in half and connecting
the two together.
AIRFLOW:
25,000mm² per metre
MATERIAL: PVC.
COLOUR: Black.

SLATE ROOF VENTILATOR
HD SRV680
USE: Slate roof ventilator for use with
man-made or natural slates.
ADVANTAGES: Long life, simple to
install with minimum cutting of slates.
UV light and acid rain resistant. Large
base for ‘random’ slate roofs with a
facility for trimming to 600 x 300mm. Stable at temperatures
of -40°C to +120°C.
May be used for soil ventilation and mechanical extraction
when fitted with the HD SPA680 soil pipe adapter kit.
MATERIAL: High density polypropylene in Black. Grey to order.
AIRFLOW: 20,000mm² actual ventilation area.
ACTUAL BASE SIZE: 452mm wide x 682mm deep.
NOTE: Roofing underlay preparation to be in accordance with
HD ILSRV’s.
HD SPA680 For use with HD SRV680 slate roof
ventilators.
USE: Connecting 110mm soil vent pipe outlet to
10,000mm² area ventilator.
ADVANTAGES: May be used for mechanical
extraction when fitted to HD SRV680 vents.
Length = 500mm.
AIRFLOW: Total through ventilation area for the
adapter is 8,000mm².
Adapters only available.

HD SRV5U, HD SRV10U & HD SRV10/20
Hambleside Danelaw Limited surface ventilators require the
underlay to be cut to an inverted ‘T’ shape ensuring a close
snug fit to the vent spigot or aperture. The cuts forming the
‘T’ should be folded up and back to deflect moisture and
debris away from the cut hole in the underlay. This careful
preparation will assist in preventing water penetration should
other problems exist above the line of the vent, i.e. excessive
condensation, cracked / broken or missing slates, etc.

USE: Slate roof ventilator
for use with man-made or
natural slates.
ADVANTAGES: Long life,
simple to install with
minimum cutting of slates.
Suitable for both batten
and sark board fixing.
UV light and acid rain
resistant.
This universal slate
ventilator is unique and
available for use with the
following slate sizes:
600 x 300mm, 500 x
250mm, 450 x 230mm.
Stable at temperatures of
-40°C to +120°C. May be
used for soil ventilation and
mechanical extraction when
fitted with the HD SPA soil
pipe and adapter plate.
MATERIAL: High density
polypropylene in Black. Grey
to order.
AIRFLOW: 10,000mm²
actual ventilation area.
ACTUAL BASE SIZE:
400mm wide x 454mm
deep.

Roof Ventilation Products

Tile Roof Ventilators

Hambleside
Danelaw
Recommendations
Hambleside Danelaw
Limited recommends,
in accordance with
recognised good
tiling practice, that
all interlocking tiles
should be laid as
close to the mid shunt
position as possible.
Tiles laid too closely
together cannot
always accommodate
the expansion and
contraction of the
tiles and the roof
structure below; this
could result in the
possibility of the
tiles lifting and the
interlocks cracking.
Likewise, the tile
vents may also lift
or distort under the
compression forces
created.
Should difficulty
occur in providing
conventional cross
flow ventilation at
eaves level, when
maintaining insulation
thickness to avoid
cold bridging for
example, Hambleside
Danelaw Limited
recommends the use
of slate or tile vents
positioned as close to
eaves level as possible
whilst ensuring that
they are located
above the level of the
internal insulation
layers.
All Hambleside
Danelaw roof
ventilation products
are suitable for use
when the vapour
tightness of the
ceiling, or the sealing
of all joints in and
penetrations through
VPUs in non-ventilated
roof constructions,
cannot be achieved or
maintained for the life
of the roof.

ALL HD TV’s AND HD ILSRV’s

HD TV15/1

HD TV15/2

Hambleside Danelaw Limited surface ventilators require the underlay
to be cut diagonally to form an envelope ensuring a close snug fit to
the vent spigot or aperture. The cuts forming the envelope should
be folded up and back to deflect moisture and debris away from
the cut hole in the underlay. This careful preparation will assist in
preventing water penetration should other problems exist above
the line of the vent, i.e. excessive condensation, cracked / broken or
missing slates or tiles, etc.

TILE ROOF VENTILATORS
HD TV15 SERIES & HD TV10 SERIES

HD TV15/3

HD TV10/6

HD TV15/4

HD TV15/7

HD TV10/8

USE: Designed for use with
the most popular tile profiles,
they provide attractive but
discrete ventilation entry
through the roof surface. With
the use of additional adapters
they can be fully utilised for
both mechanical extraction
and soil ventilation.
MATERIAL: Manufactured
from high density
polypropylene for durability
and thermal stability, they
have a non-reflective surface
and are UV stabilised to
prevent embrittlement
through age.

Vent Area 2,000mm²
actual ventilation area per tile
ventilator.
USE: Fitted in groups of 5 to
achieve regulation 10,000mm²
per metre.

Material: Manufactured from
high density polypropylene for
durability and thermal stability.
The vent has a non-reflective
surface and is UV stabilised
to prevent colour loss and
embrittlement through age.
Colours Standard colour
range of Terracotta, Brown,
Antique Red, and Grey. Special
colours to order.

UNIVERSAL DRY FIX VENTILATED RIDGE SYSTEM
HD DFR3
USE: A universal Dry Fix ridge system
that can be used with all commonly
available ridge, tiles and slate types.

DFR3 Installations

ADVANTAGES: Can be fitted in all
weathers and to all roof pitches with no
special tools required. The system has
a minimum number of components,
is simple and quick to install with no
reliance on adhesive strips.
Provides a secure fixing against the
weather with easy ridge alignment and
discreet appearance.

KEY

Supplied 3 linear metres per pack.
AIRFLOW: DRF3 provides 5,000mm²
airflow area per linear metre to both
roof slopes making it ideally suited to
cold and warm roofs and for batten
space ventilation.
Commonly used as a Dry Fix Ridge
installation kit where ventilation is not
required.

DFR3 Components

Uni-Ridge Gasket showing
how it can accommodate
differing tile profiles

USE: A universal Dry Fix ridge and hip system that can be used
with all commonly available ridge, tiles and slate types.
ADVANTAGES: Can be fitted to all roof pitches with no special
tools required. The single unique universal jointing gasket adds
flexibility and allows compatibility with most commonly available
ridge and hip tile profiles. Broader corrugations than other similar
systems at the edge of the RollOut accommodate more types of
ridge design and different pitches of roof. Suitable for Hip and
Ridge applications. Clips for hip tile cuts provided separately if
required.
RollOut is available in either 6m (HD ROR6) or 3m (HD ROR3)
packs to suit all requirements, large or small.

USE: Permits high levels of
ventilation through walls.
Provides entry of air into
underfloor voids of suspended
floors when used with the
Telescopic Ventilator.
ADVANTAGES: Standard
brick size, ingress protection
from driving rain and large
insects (4mm flyscreen).
Ventilation area in excess
of 7,000mm². Bricks may
be clipped together for 225
x 150mm or 225 x 225mm
combinations.
MATERIAL: Injection
moulded in polypropylene –
UV stabilised.

USE: Provides ventilating air
into the cavity, and when used
with cavity tray DPC detailing,
allows moisture permeating
the cavity area to be returned
to the outside.
ADVANTAGES: Wall weep
and cavity ventilator in the
same product. Ideal for all
standard detailing – window/
door lintels or with airbricks
for underfloor/ through cavity
venting. Unique internal
design allows fitting in either
direction. Sealed base of

USE: A lintel stop end for
use at the ends of most
popular DPC steel lintels.
The HD 9800 provides a stop
end preventing discharge of
water into the cavity.
USE WITH: HD 9800 Lintel
Stop Ends may also be
applied to a range of cavity
trays. Now recommended
by the NHBC and BS 8215
1991.

BENEFITS:
n Adjustable to most shapes
and types of lintels for
a secure fit.
n Ensures consistent and
compliant build detail.
n Integral bonding strip on
the base.
MATERIAL: Polypropylene.

APPLICATIONS

Telescopic Underfloor Vent
HD 9600M

12

Square to Round Adapter
HD 9620

Airbrick/Sleeve HD 9300 and
HD 9350

Weep Vent and
Stop End Assembly

GRP Flashings Products

Dry Fix Valley Troughs

PRODUCT
VERIFICATION
NFRC Hambleside
Danelaw
are Associate
Manufacturing
Members of the
National Federation
of Roofing
Contractors and
also participate in
the Co-Partnership
Guarantee Scheme.
BCL Birmingham
City Laboratories
(formerly
Industrial Research
Laboratories)
certification
available from
tests carried out
on GRP products,
Tile Ventilator and
Slate Ventilator
ranges.
Rapra
Technology
Limited
Independent tests
carried out on
the performance
of Hambleside
Danelaw GRP.
Copies of the
report are available
on request from
our Daventry office

Dry Fix mortarless GRP Valley Trough creates close-cut appearance on new build and refurbishment. Suitable for
all profiled tiles. Available in standard lead grey colour, this unique product cuts fixing time by up to 50%.
GRP valley troughs provide the following advantages over lead products

n Up to half the cost of traditional lead
installation
n Semi-skilled fitting procedure

n 30 year guarantee
n Third party testing accreditation by
RAPRA Technology and Birmingham City
Laboratories

n Reduce installation time and cost by up
to 50%

n Does not streak or stain slates or tiles

n Pre-formed profiles are light in weight and easy to
handle

n Can be safely used with other products to recycle
rainwater

n BBA approved

n No value to the thief

DRY FIX VALLEY TROUGH FOR SLATE ROOFS
HDL DVS/1 & 2

DRY FIX VALLEY FOR PLAIN/LOW PROFILE TILES
HDL DVLPT/1 & 2

Dry Fix Valley Trough for slate roof applications.

Dry Fix Valley Trough for plain and low profile tiles.

UK Patent No. 2307922

UK Patent No. 2307922

Supplied in packs of 5 units in either 2.4 or 3m lengths.

Supplied in packs of 5 units in either 2.4 or 3m lengths.

HDL DVS/1 x 3000mm – lead grey
HDL DVS/2 x 2400mm – lead grey

HDL DVLPT/1 x 3000mm – lead grey
HDL DVLPT/2 x 2400mm – lead grey
360

360

80
55

DRY FIX VALLEY FOR HIGH PROFILE TILES
HDL DVT/1 & 2

SMALL CUT TILE SUPPORT BRIDGE
HD DVBP

Dry Fix Valley Trough for high profile tiles.

In the case of interlocking
single lap tiles, where small
cuts of tiles occur, with
HDL DVT and HDL DVLPT
Valleys. The smaller cut
section may need to be
supported using a ‘support
bridge’ UK Patent No.
2307922, positioned over
the inner water bar.

Alternatively a stainless
steel tile clip, HD DVC,
may be used as illustrated.
This support should only
be required on the left
side of the valley where no
support is available from
the tile interlock, ref. BBA
Certificate No. 87/1915.

Supplied in packs of 10 units.
HDL DBG1 is 210mm wide and
manufactured to a length of 3m
with a central upstand height of
70mm to suit slates, flat interlocking
tiles and plain tiles.

225

210
100

HDL DBG2 is 210mm wide and
manufactured to a length of 3m
with a central upstand height of
100mm to suit profiled tiles on
one or both sides and also typical
Scottish practice where there may
be tiling battens on one side only.

Replaces the need to cut
slates to form the first
support eaves course.
Supplied in packs of 10
units.
Size: W355mm x L3000mm

45

150

UNIVERSAL ABUTMENT COVER FLASHING
HD UACF
A continuous GRP cover
flashing in standard lead
grey colour as an attractive
and cost effective alternative
to lead for all roof abutments.
Easily trimmed on site to suit
the application.
Size: H150 x W45 x L3000mm

17

Flashing Products

Conti-Soaker™ Continuous Soakers

CONTI-soaker™ FOR SLATE
HDL CSS

170

170

150

140

Available in Lipped and
Unlipped versions for slate
roofs, they can be fitted in
approximately half the time it
takes to install lead.

Also available for Scottish
slate practice:

160

Supplied in packs of 10 units.
200

Size:
Lipped
H150 x W170 x L3000mm
Unlipped
H140 x W170 x L3000mm

HDL SCSS Conti-Soaker™.
170

170

CONTI-soaker™ FOR TILES
HDL CST

150

140

Continuous Soaker for tiles
with mortar bonding strip.
Available in Lipped and
Unlipped versions for tile
roofs, they can be fitted in
approximately half the time it
takes to install lead.

Size:
Lipped
H150 x W170 x L3000mm
Unlipped
H140 x W170 x L3000mm

Supplied in packs of 10 units.

TYPICAL INSTALLATION DETAILS
LIPPED TILE VERSION
Lip set in mastic

Tile

Mortar

UNLIPPED TILE VERSION

LIPPED SLATE VERSION

UACF or
Stepped lead
flashing
Tile

Mortar

Lip set in mastic
Slates

Counter
batten
Bearer
Rafter

Counter
batten
Bearer
Rafter

UNLIPPED SLATE VERSION

UACF or
Stepped lead
flashing

Counter
batten

Batten
Bearer
Rafter

Counter
batten
Rafter

Bearer

SCOTTISH VERSION
LIPPED TILE VERSION

UNLIPPED SLATE VERSION

LIPPED SLATE VERSION
Render with
Bell Cast

Slates

Sarking Board
Rafter

18

Flashing Products

Individual Dry Soakers
All Hambleside Danelaw Individual Dry Soakers are quick and
simple to install. They are available for both tile and slate
roofs in right and left handed versions. They are made from
lightweight, high density polypropylene chosen for its thermal
stability, resistance to UV light, acid rain and cracking under
temperature change.

Dry Verges
Continuous Dry Verges have been developed for use with
both natural and fibre cement slates giving the advantages of
all weather fixing and permanent wind protection; a product
which is simple to install without complicated interlocking
methods. Scotverges have been developed for typical Scottish
slating practice

Ridge Joint
Ridges The Dry Verges are cut
with a vertical mitre and butt
jointed. A lead saddle may be
fitted over the joint if required.
The ridge tile should be trimmed
if neccessary to suit.

20

Verge Joints Where joints in
the Dry Verge are required along
the edge of the roof, they should
be overlapped with the lower
section fitted over/around the
upper section.

Sprockets Slight or gentle
sprockets can easily be
accommodated by cutting the
lower section to a slight rake and
fitting over the upper or main
Dry Verge section.

NOTE:
These jointing methods are
suitable for all of the Dry Verge
profiles.

Ancillary Products

UNDERLAY SUPPORT TRAY
HD 3000
USE: Provides full support
and eaves protection for
roofing underlay at eaves
level. Combines to provide
drip into guttering.
BENEFITS: Clips together
for universal rafter spacing.
Hinged at fascia to prevent
panel distortion on low
pitches.

Fixed with HD 12000M or
HD 12000U or directly to the
top of the fascia board.
coverage: 600mm per
panel.
MATERIAL: Black pvc.

RIGID UNDERLAY SUPPORT TRAY
HD RFST
USE: Ideally suitable for
eaves refurbishment details,
this rigid pvc unit provides an
immediate and cost effective
solution to situations where
damage to the underlay has
occurred.
NOTE: The Rigid Underlay
Support Tray should be
nailed to the top of the fascia
board.

USE: The Underlay
Support Tray can be used
in conjunction with either
traditional soffit strip
ventilator configurations
(HD 8000 and HD 8250) or
with over fascia ventilators
(HD 12000M or the
HD 12000U universal).
Length: 1500mm
MATERIAL: Black pvc.

LOFT ACCESS Trap DOORS
HD TRAPPU & HD TRAPDD
Thermal
Performance
Building
Regulations
Approved
Document C 2004
Edition requires
that in order to
resist surface
condensation and
mould growth,
a roof should be
designed and
constructed so
that the thermal
transmittance
does not exceed
0.35W/m²K at any
point.

USE: Provides
straightforward access
through ceilings into loft
spaces.
ADVANTAGES: Easy to
install, maintenance free,
with no need to paint. Loft
access door panel offering
an integral draft/vapour seal.
Push up version is fitted with
two catches to provide secure
closing and prevent uplift.
The hinged version is suitable
for use with a telescopic loft
ladder.

Push up version
HD TRAPPU

Steel loft access door, fire
rated to Class 0.
HD TRAPDDF

Drop down version.
HD TRAPDD

MATERIAL: White injection
moulded polypropylene with
integral insulation.
SIZES: All models meet or
exceed the NHBC minimum
opening size of 520mm
in any direction and suit
600mm joist centres. They
can be used with other joist
centres by cutting a joist and
trimming the opening in an
approved manner.

The Group and the Environment
Hambleside Danelaw has developed a comprehensive environmental policy, embracing
the key issues of greenhouse gas emissions, sustainability and recycling of product at
end of life. Full information on the environmental policies of Hambleside Danelaw,
including its Corporate Social Responsibility statement, is available from our website.

The Company has a continuing product development
programme. News relating to these products, or
technical developments, is issued regularly in the form of
Information and Data Sheets.
Communication with our customers is welcomed on
all subjects relating to the performance of products, or
on their use on-site. In accordance with our policy for
continuous improvement we reserve the right, should
the need arise, to amend product specifications without
prior notice.
Terms and Conditions of Sale are available upon request.
The Company reserves the right to implement a 25%
restocking charge for returned goods.
All images are for illustration purposes only and
Hambleside Danelaw reserve the right to amend
specifications without prior notice.